package com.qinhai.webcs.interceptor;

import com.qinhai.webcs.pojo.User;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * @ClassName UserInterceptor
 * @Deacription
 * @Author qinhai
 * @Date 2021/4/14 20:42
 * @Version 1.0
 **/
public class UserInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        HttpSession session = request.getSession();
        User user = (User) session.getAttribute("user");

        if (user != null) {
            return true;
        }
        request.setAttribute("userMsg", "请先登录");
        request.getRequestDispatcher("/login").forward(request, response);
        return false;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}
